Improvement in window-shade fixtures



c, de QUILLFELDT, WINDOW-SHADE FIXTURE v Nn.176,84 3. 'Patenterl May2,1876.

N PETER8, FHOTO-LITHORRAPMERI, WASHINGTON. D. C.

UNITED STATES PATENT OF I E.

CHARLES VDE QUILVLFELDT, OF NEW YORK, N. Y.

IMPROVEMENT IN WINDOW-SHADE FIXTURES. I

Specification forming part of Letters Patent No. I 76,843, dated May 2,1876 application filed February 21, 1876.

To all whom it may concern:

Be it known that'I, CHARLES DE QUILL- FELDT,0t' the city, county, andState of New York, have invented new and useful Improvements inWindow-Shade Fixtures, of which the following is a specification:

The invention will first bedescribed in connection with the drawing, andthen pointed out'in the claim. I

Figure 1 is a side elevation of a portion of a curtain and rolleraudsection of the metallic fixtures comprising my invention. Fig. 2 is atransverse section, showing the position of the pawls when the curtainis descending; and Fig. 3 is a transverse section, showing the positionwhen holding the curtain.

V pivot or bearing of the roller, and is fitted in the center of thecam-disk I, which is also the bracket for supporting the roller-pivot..(lhe,' pawls G are fitted on pivot-studs J of disk F,-

which are so located that when the pawls swing out to lock the roller,the toes K touch the hub L of the disk and hold them in the position forlocking. These studs are cast toget-her with the plate, and are thusmade cheaper than the ordinary arrangement of fit-' ting in separatepieces. The pawls are in this example confined on the studs bythe cap MThe notch N in the cam-disk receives the pawls and locks the roller whenthe motion is quick enough to throw them out into it by centrifugalforce, but said notch is so located that the pawls are kept out of itby. gravity when the motion is slow enough for the gravity to exceed thecentrifugal force.

O is a spring for making the frictional connection of the roller withthe "cam-disk F, so that the roller can be pulled down when the cam-diskis locked. This spring I have located in the hollow cord drum as acompact and simple arrangement of the same.

It will be seen that the partsare all of the simplest construction, andthey are so contrived that but very little labor is required in fittingthem to the roller.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The combination, with roll and curtain A B,

of cap (J, having a drum, D, on which is wound a cord, E, the disk Fhaving hub L, and centrifugal pawls G K, the screw H serving both asclamp and roll-pivot, and the cam-disk I, formed on the bracket whichsupports the pivot, all constructed and arranged substantially as andfor the purpose specified.

CHAS. DE QUILLFELDT.

